How many times can you fat finger the Bitlocker recovery key? - Microsoft Q&A (2024)

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How many times can you fat finger the Bitlocker recovery key? - Microsoft Q&A (1)

JasonO 21Reputation points

2022-09-19T14:36:52.663+00:00

We are rolling out bitlocker to our enterprise and was asked this question: "How many times can a person mistype the recovery key?" I was not able to find a definite answer and was hoping someone from Microsoft could clear this up. Not to be confused with PIN, I am asking about the Bitlocker Recovery Key and how many times a person can mistype the key before something happens, if anything.

Thanks

Windows 10 Security

Windows 10 Security

Windows 10: A Microsoft operating system that runs on personal computers and tablets.Security: The precautions taken to guard against crime, attack, sabotage, espionage, or another threat.

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  1. How many times can you fat finger the Bitlocker recovery key? - Microsoft Q&A (2)

    Limitless Technology 44,221Reputation points

    2022-09-21T15:17:40.457+00:00

    Hello

    Thank you for your question and reaching out. I can understand you are having query related to How many times Bitlocker wrong key can be entered.

    Nothing. Bitlocker cannot shut anything out because it is launched before Windows starts and before networking is operational.

    --------------------------------------------------------------------------------------------------------------------------

    --If the reply is helpful, please Upvote and Accept as answer--

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    1. How many times can you fat finger the Bitlocker recovery key? - Microsoft Q&A (3)

      Dillon Silzer 57,231Reputation points

      2022-09-19T15:11:21.88+00:00

      Hi @JasonO

      Please see:

      TPM 2.0 anti-hammering

      https://learn.microsoft.com/en-us/windows/security/information-protection/tpm/tpm-fundamentals#tpm20-anti-hammering

      For systems with TPM 2.0, the TPM is configured by Windows to lock after 32 authorization failures and to forget one authorization failure every 10 minutes. This means that a user could quickly attempt to use a key with the wrong authorization value 32 times. For each of the 32 attempts, the TPM records if the authorization value was correct or not. This inadvertently causes the TPM to enter a locked state after 32 failed attempts.

      Attempts to use a key with an authorization value for the next 10 minutes would not return success or failure; instead the response indicates that the TPM is locked. After 10 minutes, one authorization failure is forgotten and the number of authorization failures remembered by the TPM drops to 31, so the TPM leaves the locked state and returns to normal operation. With the correct authorization value, keys could be used normally if no authorization failures occur during the next 10 minutes. If a period of 320 minutes elapses with no authorization failures, the TPM does not remember any authorization failures, and 32 failed attempts could occur again.

      In short, you can fat finger the Bitlocker recovery key as many times as you want as long as you are willing to wait.

      If this is helpful please accept answer.

      1. How many times can you fat finger the Bitlocker recovery key? - Microsoft Q&A (4)

        JasonO 21Reputation points

        2022-09-19T16:37:10.65+00:00

        I believe this is referring only to a PIN and not specifically the recovery key when in recovery mode. Am I incorrect?

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    How many times can you fat finger the Bitlocker recovery key? - Microsoft Q&A (2024)

    FAQs

    How many times can you fat finger the Bitlocker recovery key? - Microsoft Q&A? ›

    In short, you can fat finger the Bitlocker recovery key as many times as you want as long as you are willing to wait.

    How many BitLocker attempts do you get? ›

    For each of the 32 attempts, the TPM records if the authorization value was correct or not. This inadvertently causes the TPM to enter a locked state after 32 failed attempts.

    How long is the BitLocker lockout? ›

    Standard user lockout duration (set to 8 hours) Standard user individual lockout threshold (set to 20) Standard user total lockout threshold (set to 20)

    What can trigger the BitLocker recovery key? ›

    The following list provides examples of common events that cause a device to enter BitLocker recovery mode when starting Windows:
    1. Entering the wrong PIN too many times.
    2. Turning off the support for reading the USB device in the preboot environment from the BIOS or UEFI firmware if using USB-based keys instead of a TPM.
    Jun 18, 2024

    How many times can you enter a BitLocker recovery key? ›

    If a period of 320 minutes elapses with no authorization failures, the TPM does not remember any authorization failures, and 32 failed attempts could occur again. In short, you can fat finger the Bitlocker recovery key as many times as you want as long as you are willing to wait.

    How do I unlock BitLocker forever? ›

    1. Type and search [Manage BitLocker] in the Windows search bar①, then click [Open]②.
    2. Click [Turn off BitLocker]③ on the drive that you want to decrypt. ...
    3. Confirm whether you want to decrypt your drive, then select [Turn off BitLocker]④ to start turning off BitLocker, and your drive will not be protected anymore.
    Oct 24, 2023

    How to skip BitLocker recovery? ›

    Navigate to Troubleshoot > Advanced Options > Startup Settings 2. Press Restart 3. Skip the first Bitlocker recovery key prompt by pressing Esc 4. Skip the second Bitlocker recovery key prompt by selecting Skip This Drive in the bottom right 5.

    Why am I getting BitLocker recovery every time? ›

    If you experiences that the computer shows BitLocker recovery screen after power on, it means that the HDD/SDD has been encrypted. (HDD/SDD is locked.) Once PC hardware components have been replaced or BIOS settings have been changed, all may cause system shows BitLocker recovery screen after power on.

    Is it possible to unlock BitLocker without a key? ›

    If you don't have the BitLocker password and recovery key, you may need to format the drive to remove the encryption, or use the third-party tools, such as Passware Kit, Elcomsoft Forensic Disk Decryptor, and Elcomsoft Distributed Password Recovery.

    What happens if I can't find my BitLocker recovery key? ›

    If you are unable to locate a required BitLocker recovery key and are unable to revert a configuration change that might have caused it to be required, you must reset your device using one of the Windows 10 recovery options.

    How do I unlock BitLocker in recovery mode? ›

    If the status is returned as locked, you must use the following command to unlock it using your recovery password: manage-bde -unlock c: -rp your 48-digit recovery password.

    How to unlock USB drive BitLocker forgot password? ›

    I have forgotten the bitlocker password for my USB pen drive,...
    1. Insert the USB drive that you have BitLocker encrypted into your PC.
    2. When prompted to enter the password to unlock the drive, click More Options then Enter Recovery Key.

    What triggers BitLocker lockout? ›

    The BitLocker recovery key prompt can be triggered by a variety of reasons, including hardware changes, software updates (especially if BIOS update is involved), etc. It is not necessarily alarming. The recent security update can be definitely a trigger here as well.

    Does BitLocker recovery key change every time? ›

    The BitLocker recovery key is created when a file system is BitLocker encrypted. Providing the file system is not re-formatted or BitLocker is turned off, the key remains the same. If you reapply BitLocker a new recovery key will be created.

    Can Microsoft give me my BitLocker recovery key? ›

    Important: Microsoft Support is unable to provide, or recreate, a lost BitLocker recovery key.

    Can you get locked out of BitLocker? ›

    BitLocker is a Microsoft encryption product that is designed to protect user data on a computer. If a problem with BitLocker occurs, you encounter a prompt for a BitLocker recovery key. If you do not have a working recovery key for the BitLocker prompt, you are unable to access the computer.

    How long does BitLocker take to disable? ›

    Disabling BitLocker

    NOTE: Decryption can take anywhere from 20 minutes to a couple of hours. The time depends on the amount of data that has been encrypted, the speed of the computer, and whether the process is interrupted.

    Why does BitLocker lock you out? ›

    Your drive was encrypted with Bitlocker and you need to locate the key to be able to use it again. That depends how it was setup, Bitlocker is not turned on by default so someone would have turned bitlocker on at some point. It sounds like the Windows update triggered bitlocker to prompt for the drive encryption key.

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